Xu Yi, Wu Lin, Ang L K
Opt Express. 2024 Mar 25;32(7):11171-11181. doi: 10.1364/OE.517418.
The spatial and angular Goos-Hänchen shifts (GHSs) and Imbert-Fedorov shifts (IFSs) are theoretically investigated in a modified Kretschmann-Raether configuration consisting of glass prism, J-aggregate cyanine dye, and air. With the excitation of surface excitation polaritons (SEPs), the spatial and angular GHSs and IFSs for the transverse magnetic polarized light are strongly enhanced around the resonant angle of SEP. A highly sensitive gas sensor based on the SEP enhanced GHS (or IFS) is proposed, which exhibits the refractive index sensitivity on the order of 10λ/RIU (or 10λ/RIU) (λ: illumination wavelength; RIU: refractive index unit) for the GHS- (or IFS-) based gas sensor, respectively.
在由玻璃棱镜、J-聚集体花菁染料和空气组成的改进型Kretschmann-Raether结构中，从理论上研究了空间和角度古斯-汉欣位移（GHSs）以及因伯特-费多罗夫位移（IFSs）。在表面激发极化激元（SEPs）的激发下，横向磁极化光的空间和角度GHSs以及IFSs在SEP的共振角附近会显著增强。提出了一种基于SEP增强GHS（或IFS）的高灵敏度气体传感器，对于基于GHS-（或IFS-）的气体传感器，其分别表现出约10λ/RIU（或10λ/RIU）（λ：照明波长；RIU：折射率单位）的折射率灵敏度。
